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Should you take a breath test in Detroit? 
Thoughts from a Detroit DUI Lawyer

1. If the police ask you to take a breath test, normally you should take it. This is particularly true if you are a first-time offender and your arrest does not involve an accident causing serious injury or death.
2. You may wish to refuse to take the test if you have been involved in an accident causing serious injury or death.
3. The results of the breath test will be admissible in court to prove your innocence or guilt.
4. If you refuse a police request to take a breath, urine, or blood test, you will lose your driver’s license for one year (or two years if this is your second refusal in seven years). MCL 257.625f.
5. If you refuse to take the test, the police and prosecutor are allowed to tell the jury of your refusal at trial, but only for the purpose of showing that the test was offered and not as evidence of your guilt.
6. In most instances, if you refuse to take the test, the police will seek a court-ordered search warrant to draw your blood, have it tested for alcohol and drugs, and be able to use the results against you at trial. Do not resist the search warrant.
7. Just before taking the breath test, breathe deeply many times so you do not get an inaccurately high result by breathing mouth alcohol into the machine.
8. Follow the police instructions carefully, because if you do not blow hard or long enough, the DataMaster instrument may register your attempt as a “technical refusal” or the police may consider your noncompliance as an “operator refusal.” 
9. If you think there is no way your alcohol level could be as high as the result reported, tell the police that you want to be transported to the nearest hospital for an independent whole blood test.